[clang] [clang-format] Add AllowShortType option for AlwaysBreakAfterReturnType. (PR #78011)

[Owen Pan via cfe-commits]

================
@@ -587,7 +589,9 @@ bool ContinuationIndenter::mustBreak(const LineState &State) {
       !State.Line->ReturnTypeWrapped &&
       // Don't break before a C# function when no break after return type.
       (!Style.isCSharp() ||
-       Style.AlwaysBreakAfterReturnType != FormatStyle::RTBS_None) &&
+       (Style.AlwaysBreakAfterReturnType != FormatStyle::RTBS_None &&
+        Style.AlwaysBreakAfterReturnType !=
+            FormatStyle::RTBS_AllowShortType)) &&
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owenca wrote:

```suggestion
       Style.AlwaysBreakAfterReturnType > FormatStyle::RTBS_AllowShortType) &&
```

https://github.com/llvm/llvm-project/pull/78011